Ly-15: a new murine lymphocyte alloantigenic locus.

Immunization between CXB recombinant inbred mice selected for their identity at known loci led to the production of antisera recognizing two specificities: the previously described Ly-9.2 alloantigen and a new specificity, Ly-15.1. A monoclonal antibody to the Ly-15.2 specificity is also described. The Ly-15 specificities were found on thymus, on lymph node and spleen cells, and on liver, but were absent from kidney, brain, and red blood cells.